Welded box frame for vertical internal combustion engines



Nov. 3o, 1937., F, FOHRER 100,775

WELDED BOX FRAME FOR .VERTICAL INTERNAL COMBUSTION ENGINES Filed Feb. 27, 1935 2 Sheets-Sheet l Iig. g

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F. FQHRER 1.005% WLDED BOX lFRAME] FOR VERTICAL INTERNAL COMBUSTION ENGINES Filed Feb. 2v, 19:55 2 sheets-sheet 2 QM Fm '6a Mara/(vm Patented Nov. 30, 1937 BOX FRAIHE- FOB, `VERTICAL IN- TERNAL COMBUSTION ENGINES Friedrich Fohrer, Augsburg, Germany, assigner to Maschinenfabrik Augsburg-Numberg A. G., Augsburg, Germany, a corporation of Germany Application February Z7, 1935, Serial No. 8,535 In vGermany March 28, 1934 3 Claims. ,(Cl. 121-194) This invention relates to welded box frames for vertical internal combustion engines, especially Diesel engines, of the character and type shown in Patent No. 1,969,031 granted August V 7, 1934, to Maschinenfabrik Augsburg-Nurnberg, A. G., wherein the tensile strains produced by the. combustion pressures inside the frame are absorbed by columns and iron ties, the arrangement being such that the columns surrounding the iron ties are welded into the apertures of a plurality of wrought-iron or steel plates extending over the entire length of the engine.

It hasbeen found that the upper horizontal longitudinal plate, to which the cylinder and l5 cylinder covers are secured, is' sometimes exposed .to bending strains, which arise when the forces produced by the combustion pressures pass from the cylinder covers over thev cover screws into the upper longitudinal plate and only from there into the columns and iron ties.

In accordance with the present invention', the cylinder covers are secured to the upper longitudinal plate by means of screws or-bolts, which are screwed into or which pass through projections arranged laterally on the upper ends of the columns. In this way the upper longitudinal plate is kept free from bending strains which would otherwise influence the welding points in an exceptionally unfavorable manner. Conse- 30 quently thedesired favorable direction or passage of the longitudinal and of the transverse forces from the plate into thecolumns is insured. Owing to the fact that the projections lie with their upper surfaces ush against the lower surf ace of the longitudinal plate, all bending strains are kept away from the longitudinal plate." Each of the said projections is provided with a boring f to receive the cylinder cover screws, this boring if necessary being threaded.

A constructional example of the invention is illustrated in the accompanying drawings,

' wherein Figure 1 is a side view of the upper part of an through one of the columns of the frame,

Figure 2 is a plan of the engine frame, a portionI of the upper longitudinal plate being cut away above one column, and

Figz. 3 is a sectionalfview o n the line 3-3 of Fig.

The columns I, through which theiron ties 2 are passed, are so introduced into'the upper longitudinalplate 4 lwith their upper ends 3 that cylinders 1 and the cylinder coversB are secured 60 to the plate I, the cylinders being outwardly engine frame partly in longitudinal section ilanged at their upper ends and these anges being recessed in grooves provided in the plate 4.

The vertical forces emanating from the combustion lpressures are in this way easily passed over byfmeans of the screws 6 directly into the projections 5 and from there into the columns I, so that the plate I is completely freed from -their load and unfavourable bending strains on the welded connection between the plate and the columns are avoided. y

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I de clare that what I claim is:

1A combustion engine frame comprising a series of cylinders each having a cylinder head, a connecting plateseparate from'said cylinders and extending transversely of the said series of cylinders for supporting the cylinder heads and with the upper side of said plate'in direct supporting contact with said heads, columns extending downwardly from and welded to said plate and adapted to assume compression forces, said columns having lateral projections integral therewith and in contact with the lower side of said plate, and means extending through said lateral projections in contact with the lower side of saidplate, tension rods extending downwardly from said plate adjacent said projections, and means extending through' saidplate and connecting said projections directly to said cylinder heads.

3. A combustion engine frame comprising a series of cylinders, a cylinder head for each cylinder, a connecting plate .extending transversely voi the saidseries of cylinders for supporting the cylinder heads and in contact with the lower sides of said heads, said plate being a part separate from said cylinders and having welded connections with said cylinders, hollow'columns extending downwardly from said plate and adapted to assume compression forces, each column having lateral projections in contact with the lower side of said plate, a tension rod extending downwardly from said plate in each hollow column, and -means extending through said plate and connecting said projections directly to said cylinder heads.

. y 1 FRIEDRICH FOHRER. 

